Objective-c(2)

Objective-c

类，对象，方法

实际的变量是类的一个实例。

实例能执行的操作称为方法。

[ClassOrInstance method];

定义类

@interface classname : superclass

define method as interface

@end

类实现

@implementation class {

变量

}

methods

@end

myFraction = [[Fraction alloc] init];

ex:

#import <Foundation/Foundation.h>

//#import "Fraction1.h"

//---------*.h

@interface Fraction : NSObject

-(void) print;

-(void) setNumerator: (int) n;

-(void) setDenominator : (int) d;

@end

//---------*.m

@implementation Fraction {

int numerator;

int denominator;

}

-(void) print {

NSLog(@"%i/%i", numerator, denominator);

}

-(void) setNumerator:(int)n {

numerator = n;

}

-(void)setDenominator:(int)d {

denominator = d;

}

@end

int main(int argc, const char * argv[]) {

@autoreleasepool {

Fraction *myFraction;

myFraction = [Fraction alloc];

myFraction = [myFraction init];

[myFraction setNumerator: 1];

[myFraction setDenominator: 3];

[myFraction print];

}

return 0;

}

@property @interface

@sysnthesize @implementation

self = this;

@class

继承与覆盖

抽象

多态

is* 来判断

@try {

}

@catch)NSException * ex) {

}

@finally

@throw

@protected

@private

@public

@package

enum枚举

typedef

第十章看完。